ppcv_cpuconfig_400.c

qnx powerpc MPC8245的 BSP源文件

/*
 * $QNXLicenseC: 
 * Copyright 2007, QNX Software Systems.  
 *  
 * Licensed under the Apache License, Version 2.0 (the "License"). You  
 * may not reproduce, modify or distribute this software except in  
 * compliance with the License. You may obtain a copy of the License  
 * at: http://www.apache.org/licenses/LICENSE-2.0  
 *  
 * Unless required by applicable law or agreed to in writing, software  
 * distributed under the License is distributed on an "AS IS" basis,  
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied. 
 * 
 * This file may contain contributions from others, either as  
 * contributors under the License or as licensors under other terms.   
 * Please review this entire file for other proprietary rights or license  
 * notices, as well as the QNX Development Suite License Guide at  
 * http://licensing.qnx.com/license-guide/ for other information. 
 * $ 
 */

#include "startup.h"

void
ppcv_cpuconfig1_400(int cpu) {
	unsigned	ccr;

	/* Put the exception table at the bottom of memory. */
	set_spr(PPC400_SPR_EVPR, 0);

	/* Make sure that the lower 128M region is cacheable */
	ccr = get_spr(PPC400_SPR_ICCR);
	if(!(ccr & PPC400_ICCR_S0)) {
		/* I cache */
		set_spr(PPC400_SPR_ICCR, ccr | PPC400_ICCR_S0);
	}
	ccr = get_spr(PPC400_SPR_DCCR);
	if(!(ccr & PPC400_DCCR_S0)) {
		/* D cache */
		set_spr(PPC400_SPR_DCCR, ccr | PPC400_DCCR_S0);
	}
}